Photocatalytic hydrogen production from water over a LaMnO3/CdS nanocomposite prepared by the reverse micelle method

Kida, Tetsuya; Guan, Guoqing; Minami, Y; Ma, Tingli; Yoshida, Akira

doi:10.1039/b211812b

Cited by 49 publications

(24 citation statements)

References 31 publications

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“…Other examples illustrative of this approach were discussed earlier in this chapter and include CdS-TiO 2 [390] and CdS-K 4 Nb 6 O 17 [351]. Other examples of mixed semiconductors include TiO 2 -LaCrO 3 [391] CdS-LaCrO 3 [332], Fe 2 O 3 -TiO 2 [392], and Cu 2 O-TiO 2 [393]. However, not all these composites have been examined from a water photosplitting perspective.…”

Section: Semiconductor Alloys and Mixed Semiconductor Compositesmentioning

confidence: 95%

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

2007

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This review focuses on the use of inorganic oxide semiconductors for the photoassisted generation of hydrogen from water. Representative studies spanning approximately three decades are included in this review. The topics covered include a discussion of the types of water photosplitting approaches, an ideal photoelectrolysis system, an examination of why oxide semiconductors are attractive for this application, a review of both classical and more recent studies on titanium dioxide, tungsten trioxide, and other binary metal oxides, perovskites and other ternary oxides, tantalates and niobates, miscellaneous multinary oxides, semiconductor alloys and mixed semiconductor composites, and twin-photosystem configurations for water splitting.

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Section: Semiconductor Alloys and Mixed Semiconductor Compositesmentioning

confidence: 95%

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

2007

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“…By doping the surface of CdS microcrystals with Ag 2 S, Cu 2 S, CuS, and Bi 2 S 3 nanoparticles it is possible to increase the photocatalytic activity of cadmium sulfide in the reduction of methylene blue dye [74,75] and the formation of hydrogen in aqueous solutions of electron donors [73]. The CdS/ZnS [45] and LaMnO 3 /CdS [95] nanocomposites also have enhanced activity compared with the individual components in the last reaction. Many photocatalytic redox reactions take place with high quantum yields if the individual semiconductor is replaced by nanocomposites based on oxide semiconductors.…”

Section: The Separation Of Charges In Binary Nanostructural Semicondumentioning

confidence: 99%

Quantum Size Effects in Semiconductor Photocatalysis

et al. 2005

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The characteristics of photocatalytic systems based on nanostructural semiconductors, characterized by quantum size effects, are discussed. An analysis is made of the consequences of exciton quantum confinement in the volume that are significant for photocatalysis and, in particular, the increase in the energy of photogenerated charges with decrease in the particle size, the photoinduced polarization processes, and also the simultaneous display of these effects. Possible ways of further increasing the effectiveness of systems based on nanostructural semiconductors are examined.

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“…[47] In our case, spectral properties of chromium centres can be correlated with formal electrode potentials on the basis of energy diagrams of the 3d energy states of Cr III , Cr IV , and Cr V proposed by Sakai et al, [48] and Moretti and Michel-Calendini [49] with respect to the cluster valence edge of chromium-doped BaTiO 3 and to those recently calculated by Long et al [50] for describing the spectra of Cr III -doped LaSc 3 (BO 3 ) 4 , by Torchia et al [51] for Cr III ions in LiNbO 3 , by Kammoun [52] for Cr IV ions in LiAlO 2 and by Herren et al [53] [50][51][52][53] Formal electrode potentials are correlated with the vacuum level by assuming that the normal hydrogen electrode is 4.4 eV below the vacuum level. [54,55] Accordingly, the AgCl/Ag electrode will be 4.6 eV below the vacuum level. The corresponding energy diagram is shown in Figure 8.…”

Section: Correlation Between Spectral and Electrochemical Datamentioning

confidence: 99%

Electrochemical Detection of High Oxidation States of Chromium(IV and V) in Chromium‐Doped Cassiterite and Tin‐Sphene Ceramic Pigmenting Systems

et al. 2006

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Solid-state electrochemistry is applied to detect the presence of chromium centres with high oxidation states in chromiumdoped cassiterite and tin-sphene ceramic pigmenting systems. Voltammetric data indicate that Cr V and Cr IV centres with different coordinative arrangements exist in the studied materials, and yield proton-assisted reduction processes at +0.95, +0.42 AgCl/Ag in contact with 0.50 M H 2 SO 4 . Electro-

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Photocatalytic hydrogen production from water over a LaMnO3/CdS nanocomposite prepared by the reverse micelle method

Cited by 49 publications

References 31 publications

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Hydrogen generation at irradiated oxide semiconductor–solution interfaces

Quantum Size Effects in Semiconductor Photocatalysis

Electrochemical Detection of High Oxidation States of Chromium(IV and V) in Chromium‐Doped Cassiterite and Tin‐Sphene Ceramic Pigmenting Systems

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